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In ecology, a population is a group of organisms of the same species which inhabit the same geographical area and are capable of interbreeding. [2] [3] The area of a sexual population is the area where interbreeding is possible between any opposite-sex pair within the area and more probable than cross-breeding with individuals from other areas.
Cartogram of the world's population in 2018; each square represents 500,000 people. This is a list of countries and dependencies by population.It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1.
Estimates of world population by their nature are an aspect of modernity, possible only since the Age of Discovery.Early estimates for the population of the world [10] date to the 17th century: William Petty, in 1682, estimated the world population at 320 million (current estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent ...
Population genetics is a subfield of genetics that deals with genetic differences within and among populations, and is a part of evolutionary biology.Studies in this branch of biology examine such phenomena as adaptation, speciation, and population structure.
Population dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical systems.Population dynamics is a branch of mathematical biology, and uses mathematical techniques such as differential equations to model behaviour.
The 2010 United States census was the 23rd United States census.National Census Day, the reference day used for the census, was April 1, 2010. [1] The census was taken via mail-in citizen self-reporting, with enumerators serving to spot-check randomly selected neighborhoods and communities.
Income inequality and mortality in 282 metropolitan areas of the United States.Mortality is correlated with both income and inequality.. Population health has been defined as "the health outcomes of a group of individuals, including the distribution of such outcomes within the group". [1]
As of 2020, Indonesians make up 3.4% of the world's total population and Indonesia is the fourth most populous country after China, India and the United States.. Despite a fairly effective family planning program that has been in place since the 1967, [55] for the decade ending in 2020, Indonesia's population growth was 1.1 percent.